YÜKSEK HIZ VE BASINÇ ŞARTLARINDA ÇALIŞAN YÜKSEK PERFORMANSLI POLİETERETERKETON TERMOPLASTİK POLİMERİNİN AŞINMA VE SÜRTÜNME DAVRANIŞLARININ BELİRLENMESİ

Öz

Bu deneysel çalışmada, yüksek performanslı mühendislik plastikleri arasında yer alan poli-eter-eter-keton (PEEK) polimerinin AISI304 paslanmaz çelik diske karşı kuru kayma şartları altındaki tribolojik performansları incelenmiştir. Aşınma deneyleri, 1.77, 3.54, 5.30 ve 8.84MPa gibi yüksek basınçlarda, 0.5, 1.0, 2.0 ve 4.0m/s gibi yüksek kayma hızlarında pim-disk aşınma cihazında gerçekleştirilmiştir. Aşınma test sonuçlarına göre, artan kayma hızı ile birlikte sürtünme katsayısı ve aşınma oranı değerleri artmıştır. Düşük yük ve kayma hızlarında düşük P.V değerleri elde edilirken artan yük ve kayma hızı ile birlikte P.V faktörünün arttığı belirlenmiştir. Genel olarak deneylerde kullanılan basınç ve kayma hızı aralıklarında sürtünme katsayısının 0.17 ile 0.39 aralığında elde edilirken, aşınma oranının ise 5.2×10-15 ile 21.4×10-15 m2/N arasında değiştiği tespit edilmiştir. Deneylerde kullanılan PEEK malzemenin yüksek P.V değerlerinde abrazif aşınma mekanizması gözlenirken düşük P.V değerlerinde adhezif aşınma mekanizması gözlenmiştir.

Anahtar Kelimeler

• PEEK
• Aşınma
• Sürtünme
• Basınç
• Kayma Hızı.

EVALUATION OF FRICTION AND WEAR BEHAVIORS OF HIGH PERFORMANCE POLYETHERETHERKETONE THERMOPLASTIC POLYMER UNDER HIGH PRESSURE AND SLIDING SPEED CONDITIONS

Öz

This experimental study examines the tribological performance of poly-ether-ether-ketone (PEEK) polymer, which is one of the high performance engineering plastics, against AISI 304 stainless steel disc under dry sliding conditions. Tribological tests were carried out on a pin-on-disc wear test machine under high applied pressures of 1.77, 3.54, 5.30 and 8.84MPa and at high sliding speeds of 0.5, 1.0, 2.0 and 4.0m/s. According to the wear test results, the friction coefficient and wear rate values increased with the increase in sliding speed values. While low P.V values were obtained at low load and sliding speeds, it was determined that the P.V factor increased with increasing load and sliding speed. In general, in the pressure and sliding speed ranges used in the experiments, the friction coefficient was obtained between 0.17 and 0.39, while the wear rate varied between 5.2×10-15 and 21.4×10-15 m2/N. While abrasive wear mechanism observed in PEEK polymer at high P.V values, adhesive wear mechanism observed at low P.V values.

Anahtar Kelimeler

• PEEK
• Wear
• Friction
• Pressure
• Sliding speed

Kaynakça

1. Avanzini, A., Donzellan, G., Mazzu, A., Petrogalli, C., 2013. Wear and Rolling contact fatigue of PEEK and PEEK composites. Tribology International, 57, 22–30.
2. Felipe, D. R., Diego Vinicius Dalevedo, B., Renan Muller, S., Guilherme Mariz De Oliveira, B., Cristiano, B., Aloisio Nelmo, K., De Mello, J.D.B., 2015. Effect of temperature and atmosphere on the tribological behavior of a polyether ether ketone composite. Friction, 3(4), 259–265.
3. Friedrich, K., Zhang, Z., Schlarb, A.K., 2005. Effects of various fillers on the sliding wear of polymer composites. Composites Science and Technology, 65, 2329-2343.
4. Geraldine, T., Thomas, G., 2016. Environmental effects on the sliding behavior of PEEK composites. Wear. 368-369, 278-286.
5. Juanjuan, Z., Fang, X., Dwyer-Joyce, R.S., 2020a. PEEK Composites as Self-Lubricating Bush Materials for Articulating Revolute Pin Joints. Polymers, 12(3), 665.
6. Juanjuan, Z., Le, M., Dwyer-Joyce, R., 2020b. Friction and wear behaviors of self-lubricating peek composites for articulating pin joints. Tribology International, 149, 105741.
7. Laux, K.A., Schwartz, C.J., 2013. Influence of linear reciprocating and multi-directional sliding on PEEK wear performance and transfer film formation. Wear, 301, 727-734.
8. Laux, K.A., Jean-Fulcrand, A., Sue, H.J., Bremner, T., Wong, J.S.S., 2016. The influence of surface properties on sliding contact temperature and friction for polyetheretherketone (PEEK). Polymer, 103, 397-404.

9. Marcela, P., Bernadette, D., Thomas, K., Archodoulaki, V.M., 2016. Studies on Tribological Behavior of PEEK and PE-UHM. AIP Conference Proceedings 1779, 070001.
10. Placette, M.D., Roy, S., White, D., Sundararajan, S., Schwartz, C.J., 2019. The effect of surface roughness orientation on PEEK (polyetheretherketone) transfer film volume in multi-directional and linear sliding. Wear, 426-427, 1345-1353.
11. Regis, M. Alex, L., Pierangiola, B., Lorenzo, F., 2018. Wear behavior of medical grade PEEK and CFR PEEK under dry and bovine serum conditions. Wear, 408-409, 86-95.
12. Rodriguez, V., Sukumaran, J., Schlarb, A. K., Baets, P. D., 2016 a. Influence of Solid Lubricants on Tribological Properties of Polyetheretherketone (PEEK). Tribology International, 103, 45-47.
13. Rodriguez, V., Sukumaran, J., Schlarb, A.K., De Baets, P., 2016 b. Reciprocating sliding wear behavior of PEEK-based hybrid composites, Wear, 362-363, 161-169.
14. Schroeder, R., Torres, F.W., Binder, C., A. N.Klein, deMello, J.D.B., 2013. Failure mode in sliding wear of PEEK based composites. Wear, 301, 717-726.
15. Zalaznik, M., Kalin, M., Novak, S., 2016. Influence of the processing temperature on the tribological and mechanical properties of polyether-ether-ketone (PEEK) polymer. Tribology International, 94, 92-97.
16. Zsidai, L., Katai, L., 2016. Abrasive wear and abrasion testing of PA 6 and PEEK composites in small-scale model system. Acta Polytechnica Hungarica, 1-20.